replace ioutil with io package and other minor improvements

hero/container.go

@@ -326,23 +326,28 @@ func Handler(fn interface{}) context.Handler {
 // It returns a standard `iris/context.Handler` which can be used anywhere in an Iris Application,
 // as middleware or as simple route handler or subdomain's handler.
 //
-//  func(...<T>) iris.Handler
+//	func(...<T>) iris.Handler
+//
 // - if <T> are all static dependencies then
 // there is no reflection involved at serve-time.
 //
-//  func(pathParameter string, ...<T>)
+//	func(pathParameter string, ...<T>)
+//
 // - one or more path parameters (e.g. :uid, :string, :int, :path, :uint64)
 // are automatically binded to the first input Go standard types (string, int, uint64 and e.t.c.)
 //
-//  func(<T>) error
+//	func(<T>) error
+//
 // - if a function returns an error then this error's text is sent to the client automatically.
 //
-//  func(<T>) <R>
+//	func(<T>) <R>
+//
 // - The result of the function is a dependency too.
 // If <R> is a request-scope dependency (dynamic) then
 // this function will be called at every request.
 //
-//  func(<T>) <R>
+//	func(<T>) <R>
+//
 // - If <R> is static dependency (e.g. a database or a service) then its result
 // can be used as a static dependency to the next dependencies or to the controller/function itself.
 func (c *Container) Handler(fn interface{}) context.Handler {

hero/func_result.go

@@ -27,11 +27,9 @@ func defaultResultHandler(ctx *context.Context, v interface{}) error {
 
 	switch context.TrimHeaderValue(ctx.GetContentType()) {
 	case context.ContentXMLHeaderValue, context.ContentXMLUnreadableHeaderValue:
-		_, err := ctx.XML(v)
-		return err
+		return ctx.XML(v)
 	case context.ContentYAMLHeaderValue:
-		_, err := ctx.YAML(v)
-		return err
+		return ctx.YAML(v)
 	case context.ContentProtobufHeaderValue:
 		msg, ok := v.(proto.Message)
 		if !ok {
@@ -45,8 +43,7 @@ func defaultResultHandler(ctx *context.Context, v interface{}) error {
 		return err
 	default:
 		// otherwise default to JSON.
-		_, err := ctx.JSON(v)
-		return err
+		return ctx.JSON(v)
 	}
 }
 

hero/func_result_test.go

@@ -92,7 +92,7 @@ func (e err) Dispatch(ctx iris.Context) {
 	// write the status code based on the err's StatusCode.
 	ctx.StatusCode(e.Status)
 	// send to the client the whole object as json
-	_, _ = ctx.JSON(e)
+	_ = ctx.JSON(e)
 }
 
 func GetCustomErrorAsDispatcher() err {